package com.kecheng.com.utils;

import net.sf.json.JSONObject;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import java.io.*;
import java.lang.reflect.Array;
import java.net.ConnectException;
import java.net.URL;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Collection;
import java.util.Date;
import java.util.Map;
import java.util.Set;


/**
 * 通用工具类
 *
 * @author liufeng
 * @date 2013-10-17
 */
public class CommonUtil {

    // 凭证获取（GET）
    public final static String token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

    /**
     * 发送https请求
     *
     * @param requestUrl    请求地址
     * @param requestMethod 请求方式（GET、POST）
     * @param outputStr     提交的数据
     * @return JSONObject(通过JSONObject.get ( key)的方式获取json对象的属性值)
     */
    public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {
        JSONObject jsonObject = null;
        try {
            // 创建SSLContext对象，并使用我们指定的信任管理器初始化
            TrustManager[] tm = {new MyX509TrustManager()};
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // 从上述SSLContext对象中得到SSLSocketFactory对象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setSSLSocketFactory(ssf);

            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            // 设置请求方式（GET/POST）
            conn.setRequestMethod(requestMethod);

            // 当outputStr不为null时向输出流写数据
            if (null != outputStr) {
                OutputStream outputStream = conn.getOutputStream();
                // 注意编码格式
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            // 从输入流读取返回内容
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String str = null;
            StringBuffer buffer = new StringBuffer();
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }

            // 释放资源
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            inputStream = null;
            conn.disconnect();
            jsonObject = JSONObject.fromObject(buffer.toString());
        } catch (ConnectException ce) {
        } catch (Exception e) {
        }
        return jsonObject;
    }


    /**
     * 获取接口访问凭证
     *
     * @param appid 凭证
     * @param appsecret 密钥
     * @return
     */


    /**
     * URL编码（utf-8）
     *
     * @param source
     * @return
     */
    public static String urlEncodeUTF8(String source) {
        String result = source;
        try {
            result = java.net.URLEncoder.encode(source, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 根据内容类型判断文件扩展名
     *
     * @param contentType 内容类型
     * @return
     */
    public static String getFileExt(String contentType) {
        String fileExt = "";
        if ("image/jpeg".equals(contentType))
            fileExt = ".jpg";
        else if ("audio/mpeg".equals(contentType))
            fileExt = ".mp3";
        else if ("audio/amr".equals(contentType))
            fileExt = ".amr";
        else if ("video/mp4".equals(contentType))
            fileExt = ".mp4";
        else if ("video/mpeg4".equals(contentType))
            fileExt = ".mp4";
        return fileExt;
    }

    /**
     * 判断对象内容是否为空
     * 对象等于null 为空
     * 对象类型支持 数组、字符串、
     *
     * @param obj
     * @return
     */
    public static boolean isEmpty(Object obj) {
        if (obj == null) {
            return true;
        }
        if (obj.getClass().isArray()) {
            return Array.getLength(obj) == 0;
        } else if (obj instanceof String) {
            return ((String) obj).trim().length() == 0;
        } else if (obj instanceof CharSequence) {
            return ((CharSequence) obj).length() == 0;
        } else if (obj instanceof Collection) {
            return ((Collection) obj).isEmpty();
        } else if (obj instanceof Map) {
            return ((Map) obj).isEmpty();
        } else if (obj instanceof Set) {
            return ((Set) obj).isEmpty();
        } else {
            return false;
        }
    }

    /**
     * 判断是否不为空
     */
    public static boolean isNotEmpty(Object obj) {
        return !isEmpty(obj);
    }

    public static String dateToString(Date date) {
        if (CommonUtil.isEmpty(date)) {//todo 不是很正常的写法
            return null;
        }

        Instant instant = date.toInstant();
        ZoneId zone = ZoneId.systemDefault();
        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("YYYY-MM-dd hh:mm:ss");
        return localDateTime.format(dateTimeFormatter);
    }

    /**
     * 判断Object是否为null
     */
    public static boolean isNull(Object oValue) {
        return oValue == null ? true : false;
    }

    /**
     * Convert string to string after trim
     */
    public static String toString(String sValue) {
        return isNull(sValue) ? "" : sValue.trim();
    }

    /**
     * 判断两个String是否相等,如果是字符,比较是否相同,如果是数字,比较是否相等
     *
     * @param aStr String
     * @param bStr String
     * @return boolean
     */
    public static boolean equalsString(String aStr, String bStr) {
        boolean isSame = false;
        aStr = toString(aStr);
        bStr = toString(bStr);
        if ((isEmpty(aStr)) && isEmpty(bStr)) {
            isSame = true;
        } else if ((isEmpty(aStr)) || (isEmpty(bStr))) {
            isSame = false;
        } else if (aStr.equals(bStr)) {
            isSame = true;
        }
        return isSame;
    }




}